Method for producing crepe paper



May 1, 1934.

c. c. WILLIS METHOD FOR PRODUCING CREPE PAPER I Filed April 25, 1932 Patented May 1, 1934 NJITED STATES METHOD FOR PRODUCING CREPE PAPER.

Charles C. Willis, Bound Brook, N. 3., assignor John Waldron Corporation, New Brunswick,

N. 3., a corporation of New Jersey Application April 25, 1932, Serial No. 607,323

3 Claims.

This invention relates to a method and apparatus for producing crepe paper.

The methods for creping paper vary depending upon the type of paper desired, for instance,

5 where a napkin crepe is manufactured the paper is generally passed through a conditioning bath and around a drum and then the paper is scraped off by a knife or drum to form the creping. In such case neither the conditioning bath nor the i0 drum is heated. For heavier crepe paper such as toweling heat is frequently used in the conditioning bath. For very heavy crepe paper such as barrel linings the bath is steam heated close to the boiling point in order to soften the sheet before applying it to the roll. The roll, however, generally being heated only by contact with the paper. For very fine luster crepes an adhesive is utilized generally in the conditioning bath. In such cases the creping cylinder is a steam heated at drum in order to dry the paper down to a point where the adhesive causes firm adhesion between the paper and the surface of the cylinder at a point where it meets the creping knife. All of these methods require that the paper absorb a fairly large amount of water which must again be dried from the paper to put the paper into commercial form necessitating the use of drying cabinets or a plurality of steam drying rolls. It has been proposed to spray an adhesive solution simultaneously upon the surface of the paper and upon the drum and then removing the paper by a knife to crepe it. It has been so difiicult to accurately control the even distribution of the adhesive over the surface of the paper by this method that the use of adhesive in the bath is the customary method.

It has been found desirable to waterproof certain forms of crepe paper and such waterproofing has been generally accomplished by first waxing the paper or applying asphalt thereto and then passing it through a conditioning bath. Another method has been to apply the wax by causing it to bear against the paper on the drum. Still another method has been to float the wax in a solution bath. v

For certain uses and purposes such as crepe paper for barrel linings or bales a backing of paper, burlap or other material is desired particu larly when a moisture-proof substance such as asphalt is utilized as a binder.

One of the objects of this invention is to provide a method and apparatus for the creping of paper, waterproofing same and utilizing said 5 waterproofing material as a binder to back the creped paper with a backing of paper, burlap or other material.

A further object of this invention is to provide a method and apparatus for creping paper whereby subsequent drying chambers or a plu- 6 rality of steam drying drums are dispensed with.

A further object of the invention is to provide a finer creping particularly with respect to heavy stock than is possible to obtain by the customary, water bath method. A still further object of the invention is to provide a solid uniform coati of asphalt prior to the creping operation, to insure all portions of paperbeing' coated with asphalt so that if in use the paper is stretched and opened up the bottom of all corrugations are covered with waterproofing material. In some of the methods used where the waterproofing material is applied to the material after it is corrugated the waterproofing material does not reach the bottom of the corrugations leaving points through which moisture may penetrate if the paper is stretched. Still another object of the invention is to provide in a single operation a method and apparatus for the waterproofing, creping and backing of paper. Other objects of the invention will appear more fully hereinafter.

Referring to the drawing:

The single figure of the drawing diagrammatically illustrates an arrangement of elements for producing moistureproof crepe paper with a backing of paper, burlap or the like.

In the usual creping operation wherein the paper is conditioned by passing through a bath the paper absorbs a large amount of moisture.

In carrying out my invention, I propose to limit the amount of moisture contained in the paper 1 and to utilize only a sufiicient amount whereby the creping can be accomplished thereby dispensing with drying chambers or plurality of drying drums and the like and securing from the device utilized a finished product. Thisresult is secured by applying a predetermined thickness of the adhesive such as casein, dextrin, starch, glue, paste or other mixture by means of a roll coating device 2 and then to pass the paper over an arch 3 to permit of a time element whereby through absorption a limited amount of the moisture in the coating may be taken up by the paper. Paper or web 1 passes from the stock roll over guide roll 4, thence between rolls 5 and 6. Roll 5 rotates in bath 5' containing the adhesive. The distance between rolls 5 and 6 in conjunction with the density of the adhesive determines the thickness of the coating. The

, the paper.

paper 1 after passing between rolls 5 and 6 then passes over rolls 7 in the form of an arch as previously stated and aroimd roll 8 onto the surface of drum 40. Roll 8 functions to iron and smooth out paper 1 and to cause it to adhere to the surface of drum 40. The latter is heated above the boiling point of water to drive the moisture contained in the adhesive and partially absorbed by paper 1 through the paper the excessive moisture passing off in the form of steam which is blown away by air jets 9. The passage of the moisture through the paper primarily in the form of steam softens and conditions the paper to the required degree to permit of the creping operation. Steam may be admitted to drum 40 through hollow shaft 10 supported on trunnions 11 only a small percentage of moisture is allowed to remain in the paper the amount being just sufficient to permit of its adherence to drum 40 and the successful creping thereof. The creping is done by the usual knife or doctor 12. The characteristicsof the creping is partially determined by the setting and form of the knife. Adjacent creping knife 12 means are provided for applying a predetermined depth of asphalt which functions as a binder and as a waterproofing of the paper. This is applied prior to the creping operation and while the paper 1 is stretched upon the drum. I preferably apply the asphalt or other waterproofiing and binding element by means of a roll coating device 13 which consists of a roll 14 rotating in a bath 15 and applying the asphalt to a roll 16 which in turn rolls it on By this means not only is the depth of coating controllable and the adhesive applied directly upon the paper while it is still on the drum 4 but by reason of the form of application there is no picking or loosening of paper 1 from drum 40 in the application of the asphalt. In addition, the asphalt can be successfully applied just prior to the creping knife and will adhere to the paper since the paper is sufficiently dry at this point. After the asphalt is applied and the paper creped by means of knife 12, the paper 1 is caused to pass between two rolls 16', 17. These rolls are either chilled steel or one of them may have an elastic surface such as rubber or the like. At this point the backing 1 after passing over guide roll 18 also passes between rolls 16 and 1'7 where it is caused to adhere to paper 1 by reason of the asphalt binder and a slight pressure exerted by the two rolls 16', 1'7. Ihe united paper and backing then passes over rolls 19 and 20 onto the surface of ironing drum 21 which removes the remaining moisture and causes backing 1 to adhere smoothly to the crepe paper. Belting 21 presses the web 1" against the surface of ironing drum 21. After passing around drum 21 the web 1" passes over guide rolls 22, 23, and thence through guide 24 and to the rewinder mechanism 25. Drum 21 is heated by steam through hollow shaft 28 supported on trunnion 29.

Drum 40 is driven through gears 29, 30, by belt 31 from step cone or Reeves 32 on shaft 33. Shaft 33 is driven by pulley 34 through belting 35 by pulley 36 on countershaft 37. Pulley 38 on shaft 33 through belting 39 drives shaft 41. Shaft 41 carries cone pulley 41' driving through belt 42, pulley 43 on roll 17. Shaft 41 also carries step pulley or Reeves 44 driving through belt 45, pulley 46 on shaft 47, having gear 48 meshing with gear 49 to drive drum 21. Shaft 41 through pulley 50 and belting 51 drives pulley 52 on shaft 53. Shaft 53 carries pulley 54 driving through belting 55, pulley 56 on shaft 5'7. A two speed clutch 58 transmits the power to the rewind mechanism 25 and permits the insertion and rewinding of the crepe stock. Upon insertion of a new core the stock builds up before guide 24. The clutch is then thrown into high speed until the stock is rewound when it is thrown into normal speed to wind up in accordance with the travel of. the paper through the machine. The coating rolls 14 and 16-may be driven either by separate motors or by belting and pulleys in the usual way from countershaft 37 or shaft 33.

It will thus be seen that I provide a method and apparatus for creping paper, waterproofing same and combining with a backing of paper, burlap and the like whereby waterproofing ma-- terial acts as a binder and whereby there is complete surface coating of the paper prior to creping with the waterproofing securing a more satisfactory resultant product and whereby the use of drying chambers or a plurality of drying drums are dispensed with and the paper is delivered in commercial form from the apparatus.

What I claim is:

1. A method for making waterproof crepe paper which comprises applying a limited amount of adhesive to one side of a web of paper, then ironing the paper upon the surface of a drum with the adhesive side down, then drying the excess of moisture for close adhesion of the paper to the drum by heating the drum, then applying a waterproof adhesive to the non-adhesive coated side of the web or paper while it is upon the drum, then creping the paper by removing the same from the drum by a knife.

2. A method for making waterproof crepe paper having a backing which comprises applying an adhesive by rolling a predetermined thickness thereof upon one side of a web of paper, then ironing the web with the adhesive side down upon a heated drum, then drying the excess moisture contained in the paper for close adhesion of the paper to the drum and simultaneously then applying a waterproof binder to the outer surface of the web upon the drum, then creping the paper and then pressing the surface of the web of paper containing the binder against a backing.

3. A method for making waterproof crepe paper having a backing which comprises applying and ironing out a web of paper upon a drum, said web of paper having had an adhesive applied to the side of the web adjacent the drum, then removing the excess moisture through the paper beyond that for close adhesion to the drum and simultaneously applying to the stretched surface on the drum a coating of a waterproof binder prior to the creping, then creping the waterproof web'by removing with a knife, then combining the creped paper with a backing by pressing the web with the binder surface against the backing, then passing the backing with the crepe waterproofed paper thereon about the surface of a heated ironing drum and then rolling the backed crepe paper in rolls for commercial use.

CHARLES C. WILLIS. 

